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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.configuration;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.File;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.PrintStream;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.PrintWriter;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.StringWriter;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.lang.reflect.InvocationTargetException;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.lang.reflect.Method;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.net.MalformedURLException;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.net.URL;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.util.Iterator;<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.commons.configuration.event.ConfigurationErrorEvent;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.commons.configuration.event.ConfigurationErrorListener;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.commons.configuration.event.EventSource;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.commons.configuration.reloading.Reloadable;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.commons.configuration.tree.ExpressionEngine;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.commons.lang.StringUtils;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.commons.logging.Log;<a name="line.36"></a>
<FONT color="green">037</FONT>    import org.apache.commons.logging.LogFactory;<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>    /**<a name="line.39"></a>
<FONT color="green">040</FONT>     * Miscellaneous utility methods for configurations.<a name="line.40"></a>
<FONT color="green">041</FONT>     *<a name="line.41"></a>
<FONT color="green">042</FONT>     * @see ConfigurationConverter Utility methods to convert configurations.<a name="line.42"></a>
<FONT color="green">043</FONT>     *<a name="line.43"></a>
<FONT color="green">044</FONT>     * @author &lt;a href="mailto:herve.quiroz@esil.univ-mrs.fr"&gt;Herve Quiroz&lt;/a&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     * @author Emmanuel Bourg<a name="line.45"></a>
<FONT color="green">046</FONT>     * @version $Id: ConfigurationUtils.java 1208795 2011-11-30 21:18:17Z oheger $<a name="line.46"></a>
<FONT color="green">047</FONT>     */<a name="line.47"></a>
<FONT color="green">048</FONT>    public final class ConfigurationUtils<a name="line.48"></a>
<FONT color="green">049</FONT>    {<a name="line.49"></a>
<FONT color="green">050</FONT>        /** Constant for the file URL protocol.*/<a name="line.50"></a>
<FONT color="green">051</FONT>        static final String PROTOCOL_FILE = "file";<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>        /** Constant for the resource path separator.*/<a name="line.53"></a>
<FONT color="green">054</FONT>        static final String RESOURCE_PATH_SEPARATOR = "/";<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        /** Constant for the file URL protocol */<a name="line.56"></a>
<FONT color="green">057</FONT>        private static final String FILE_SCHEME = "file:";<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>        /** Constant for the name of the clone() method.*/<a name="line.59"></a>
<FONT color="green">060</FONT>        private static final String METHOD_CLONE = "clone";<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>        /** Constant for parsing numbers in hex format. */<a name="line.62"></a>
<FONT color="green">063</FONT>        private static final int HEX = 16;<a name="line.63"></a>
<FONT color="green">064</FONT>    <a name="line.64"></a>
<FONT color="green">065</FONT>        /** The logger.*/<a name="line.65"></a>
<FONT color="green">066</FONT>        private static final Log LOG = LogFactory.getLog(ConfigurationUtils.class);<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /**<a name="line.68"></a>
<FONT color="green">069</FONT>         * Private constructor. Prevents instances from being created.<a name="line.69"></a>
<FONT color="green">070</FONT>         */<a name="line.70"></a>
<FONT color="green">071</FONT>        private ConfigurationUtils()<a name="line.71"></a>
<FONT color="green">072</FONT>        {<a name="line.72"></a>
<FONT color="green">073</FONT>            // to prevent instantiation...<a name="line.73"></a>
<FONT color="green">074</FONT>        }<a name="line.74"></a>
<FONT color="green">075</FONT>    <a name="line.75"></a>
<FONT color="green">076</FONT>        /**<a name="line.76"></a>
<FONT color="green">077</FONT>         * Dump the configuration key/value mappings to some ouput stream.<a name="line.77"></a>
<FONT color="green">078</FONT>         *<a name="line.78"></a>
<FONT color="green">079</FONT>         * @param configuration the configuration<a name="line.79"></a>
<FONT color="green">080</FONT>         * @param out the output stream to dump the configuration to<a name="line.80"></a>
<FONT color="green">081</FONT>         */<a name="line.81"></a>
<FONT color="green">082</FONT>        public static void dump(Configuration configuration, PrintStream out)<a name="line.82"></a>
<FONT color="green">083</FONT>        {<a name="line.83"></a>
<FONT color="green">084</FONT>            dump(configuration, new PrintWriter(out));<a name="line.84"></a>
<FONT color="green">085</FONT>        }<a name="line.85"></a>
<FONT color="green">086</FONT>    <a name="line.86"></a>
<FONT color="green">087</FONT>        /**<a name="line.87"></a>
<FONT color="green">088</FONT>         * Dump the configuration key/value mappings to some writer.<a name="line.88"></a>
<FONT color="green">089</FONT>         *<a name="line.89"></a>
<FONT color="green">090</FONT>         * @param configuration the configuration<a name="line.90"></a>
<FONT color="green">091</FONT>         * @param out the writer to dump the configuration to<a name="line.91"></a>
<FONT color="green">092</FONT>         */<a name="line.92"></a>
<FONT color="green">093</FONT>        public static void dump(Configuration configuration, PrintWriter out)<a name="line.93"></a>
<FONT color="green">094</FONT>        {<a name="line.94"></a>
<FONT color="green">095</FONT>            for (Iterator&lt;String&gt; keys = configuration.getKeys(); keys.hasNext();)<a name="line.95"></a>
<FONT color="green">096</FONT>            {<a name="line.96"></a>
<FONT color="green">097</FONT>                String key = keys.next();<a name="line.97"></a>
<FONT color="green">098</FONT>                Object value = configuration.getProperty(key);<a name="line.98"></a>
<FONT color="green">099</FONT>                out.print(key);<a name="line.99"></a>
<FONT color="green">100</FONT>                out.print("=");<a name="line.100"></a>
<FONT color="green">101</FONT>                out.print(value);<a name="line.101"></a>
<FONT color="green">102</FONT>    <a name="line.102"></a>
<FONT color="green">103</FONT>                if (keys.hasNext())<a name="line.103"></a>
<FONT color="green">104</FONT>                {<a name="line.104"></a>
<FONT color="green">105</FONT>                    out.println();<a name="line.105"></a>
<FONT color="green">106</FONT>                }<a name="line.106"></a>
<FONT color="green">107</FONT>            }<a name="line.107"></a>
<FONT color="green">108</FONT>    <a name="line.108"></a>
<FONT color="green">109</FONT>            out.flush();<a name="line.109"></a>
<FONT color="green">110</FONT>        }<a name="line.110"></a>
<FONT color="green">111</FONT>    <a name="line.111"></a>
<FONT color="green">112</FONT>        /**<a name="line.112"></a>
<FONT color="green">113</FONT>         * Get a string representation of the key/value mappings of a<a name="line.113"></a>
<FONT color="green">114</FONT>         * configuration.<a name="line.114"></a>
<FONT color="green">115</FONT>         *<a name="line.115"></a>
<FONT color="green">116</FONT>         * @param configuration the configuration<a name="line.116"></a>
<FONT color="green">117</FONT>         * @return a string representation of the configuration<a name="line.117"></a>
<FONT color="green">118</FONT>         */<a name="line.118"></a>
<FONT color="green">119</FONT>        public static String toString(Configuration configuration)<a name="line.119"></a>
<FONT color="green">120</FONT>        {<a name="line.120"></a>
<FONT color="green">121</FONT>            StringWriter writer = new StringWriter();<a name="line.121"></a>
<FONT color="green">122</FONT>            dump(configuration, new PrintWriter(writer));<a name="line.122"></a>
<FONT color="green">123</FONT>            return writer.toString();<a name="line.123"></a>
<FONT color="green">124</FONT>        }<a name="line.124"></a>
<FONT color="green">125</FONT>    <a name="line.125"></a>
<FONT color="green">126</FONT>        /**<a name="line.126"></a>
<FONT color="green">127</FONT>         * &lt;p&gt;Copy all properties from the source configuration to the target<a name="line.127"></a>
<FONT color="green">128</FONT>         * configuration. Properties in the target configuration are replaced with<a name="line.128"></a>
<FONT color="green">129</FONT>         * the properties with the same key in the source configuration.&lt;/p&gt;<a name="line.129"></a>
<FONT color="green">130</FONT>         * &lt;p&gt;&lt;em&gt;Note:&lt;/em&gt; This method is not able to handle some specifics of<a name="line.130"></a>
<FONT color="green">131</FONT>         * configurations derived from {@code AbstractConfiguration} (e.g.<a name="line.131"></a>
<FONT color="green">132</FONT>         * list delimiters). For a full support of all of these features the<a name="line.132"></a>
<FONT color="green">133</FONT>         * {@code copy()} method of {@code AbstractConfiguration} should<a name="line.133"></a>
<FONT color="green">134</FONT>         * be used. In a future release this method might become deprecated.&lt;/p&gt;<a name="line.134"></a>
<FONT color="green">135</FONT>         *<a name="line.135"></a>
<FONT color="green">136</FONT>         * @param source the source configuration<a name="line.136"></a>
<FONT color="green">137</FONT>         * @param target the target configuration<a name="line.137"></a>
<FONT color="green">138</FONT>         * @since 1.1<a name="line.138"></a>
<FONT color="green">139</FONT>         */<a name="line.139"></a>
<FONT color="green">140</FONT>        public static void copy(Configuration source, Configuration target)<a name="line.140"></a>
<FONT color="green">141</FONT>        {<a name="line.141"></a>
<FONT color="green">142</FONT>            for (Iterator&lt;String&gt; keys = source.getKeys(); keys.hasNext();)<a name="line.142"></a>
<FONT color="green">143</FONT>            {<a name="line.143"></a>
<FONT color="green">144</FONT>                String key = keys.next();<a name="line.144"></a>
<FONT color="green">145</FONT>                target.setProperty(key, source.getProperty(key));<a name="line.145"></a>
<FONT color="green">146</FONT>            }<a name="line.146"></a>
<FONT color="green">147</FONT>        }<a name="line.147"></a>
<FONT color="green">148</FONT>    <a name="line.148"></a>
<FONT color="green">149</FONT>        /**<a name="line.149"></a>
<FONT color="green">150</FONT>         * &lt;p&gt;Append all properties from the source configuration to the target<a name="line.150"></a>
<FONT color="green">151</FONT>         * configuration. Properties in the source configuration are appended to<a name="line.151"></a>
<FONT color="green">152</FONT>         * the properties with the same key in the target configuration.&lt;/p&gt;<a name="line.152"></a>
<FONT color="green">153</FONT>         * &lt;p&gt;&lt;em&gt;Note:&lt;/em&gt; This method is not able to handle some specifics of<a name="line.153"></a>
<FONT color="green">154</FONT>         * configurations derived from {@code AbstractConfiguration} (e.g.<a name="line.154"></a>
<FONT color="green">155</FONT>         * list delimiters). For a full support of all of these features the<a name="line.155"></a>
<FONT color="green">156</FONT>         * {@code copy()} method of {@code AbstractConfiguration} should<a name="line.156"></a>
<FONT color="green">157</FONT>         * be used. In a future release this method might become deprecated.&lt;/p&gt;<a name="line.157"></a>
<FONT color="green">158</FONT>         *<a name="line.158"></a>
<FONT color="green">159</FONT>         * @param source the source configuration<a name="line.159"></a>
<FONT color="green">160</FONT>         * @param target the target configuration<a name="line.160"></a>
<FONT color="green">161</FONT>         * @since 1.1<a name="line.161"></a>
<FONT color="green">162</FONT>         */<a name="line.162"></a>
<FONT color="green">163</FONT>        public static void append(Configuration source, Configuration target)<a name="line.163"></a>
<FONT color="green">164</FONT>        {<a name="line.164"></a>
<FONT color="green">165</FONT>            for (Iterator&lt;String&gt; keys = source.getKeys(); keys.hasNext();)<a name="line.165"></a>
<FONT color="green">166</FONT>            {<a name="line.166"></a>
<FONT color="green">167</FONT>                String key = keys.next();<a name="line.167"></a>
<FONT color="green">168</FONT>                target.addProperty(key, source.getProperty(key));<a name="line.168"></a>
<FONT color="green">169</FONT>            }<a name="line.169"></a>
<FONT color="green">170</FONT>        }<a name="line.170"></a>
<FONT color="green">171</FONT>    <a name="line.171"></a>
<FONT color="green">172</FONT>        /**<a name="line.172"></a>
<FONT color="green">173</FONT>         * Converts the passed in configuration to a hierarchical one. If the<a name="line.173"></a>
<FONT color="green">174</FONT>         * configuration is already hierarchical, it is directly returned. Otherwise<a name="line.174"></a>
<FONT color="green">175</FONT>         * all properties are copied into a new hierarchical configuration.<a name="line.175"></a>
<FONT color="green">176</FONT>         *<a name="line.176"></a>
<FONT color="green">177</FONT>         * @param conf the configuration to convert<a name="line.177"></a>
<FONT color="green">178</FONT>         * @return the new hierarchical configuration (the result is &lt;b&gt;null&lt;/b&gt; if<a name="line.178"></a>
<FONT color="green">179</FONT>         * and only if the passed in configuration is &lt;b&gt;null&lt;/b&gt;)<a name="line.179"></a>
<FONT color="green">180</FONT>         * @since 1.3<a name="line.180"></a>
<FONT color="green">181</FONT>         */<a name="line.181"></a>
<FONT color="green">182</FONT>        public static HierarchicalConfiguration convertToHierarchical(<a name="line.182"></a>
<FONT color="green">183</FONT>                Configuration conf)<a name="line.183"></a>
<FONT color="green">184</FONT>        {<a name="line.184"></a>
<FONT color="green">185</FONT>            return convertToHierarchical(conf, null);<a name="line.185"></a>
<FONT color="green">186</FONT>        }<a name="line.186"></a>
<FONT color="green">187</FONT>    <a name="line.187"></a>
<FONT color="green">188</FONT>        /**<a name="line.188"></a>
<FONT color="green">189</FONT>         * Converts the passed in {@code Configuration} object to a<a name="line.189"></a>
<FONT color="green">190</FONT>         * hierarchical one using the specified {@code ExpressionEngine}. This<a name="line.190"></a>
<FONT color="green">191</FONT>         * conversion works by adding the keys found in the configuration to a newly<a name="line.191"></a>
<FONT color="green">192</FONT>         * created hierarchical configuration. When adding new keys to a<a name="line.192"></a>
<FONT color="green">193</FONT>         * hierarchical configuration the keys are interpreted by its<a name="line.193"></a>
<FONT color="green">194</FONT>         * {@code ExpressionEngine}. If they contain special characters (e.g.<a name="line.194"></a>
<FONT color="green">195</FONT>         * brackets) that are treated in a special way by the default expression<a name="line.195"></a>
<FONT color="green">196</FONT>         * engine, it may be necessary using a specific engine that can deal with<a name="line.196"></a>
<FONT color="green">197</FONT>         * such characters. Otherwise &lt;b&gt;null&lt;/b&gt; can be passed in for the<a name="line.197"></a>
<FONT color="green">198</FONT>         * {@code ExpressionEngine}; then the default expression engine is<a name="line.198"></a>
<FONT color="green">199</FONT>         * used. If the passed in configuration is already hierarchical, it is<a name="line.199"></a>
<FONT color="green">200</FONT>         * directly returned. (However, the {@code ExpressionEngine} is set if<a name="line.200"></a>
<FONT color="green">201</FONT>         * it is not &lt;b&gt;null&lt;/b&gt;.) Otherwise all properties are copied into a new<a name="line.201"></a>
<FONT color="green">202</FONT>         * hierarchical configuration.<a name="line.202"></a>
<FONT color="green">203</FONT>         *<a name="line.203"></a>
<FONT color="green">204</FONT>         * @param conf the configuration to convert<a name="line.204"></a>
<FONT color="green">205</FONT>         * @param engine the {@code ExpressionEngine} for the hierarchical<a name="line.205"></a>
<FONT color="green">206</FONT>         *        configuration or &lt;b&gt;null&lt;/b&gt; for the default<a name="line.206"></a>
<FONT color="green">207</FONT>         * @return the new hierarchical configuration (the result is &lt;b&gt;null&lt;/b&gt; if<a name="line.207"></a>
<FONT color="green">208</FONT>         *         and only if the passed in configuration is &lt;b&gt;null&lt;/b&gt;)<a name="line.208"></a>
<FONT color="green">209</FONT>         * @since 1.6<a name="line.209"></a>
<FONT color="green">210</FONT>         */<a name="line.210"></a>
<FONT color="green">211</FONT>        public static HierarchicalConfiguration convertToHierarchical(<a name="line.211"></a>
<FONT color="green">212</FONT>                Configuration conf, ExpressionEngine engine)<a name="line.212"></a>
<FONT color="green">213</FONT>        {<a name="line.213"></a>
<FONT color="green">214</FONT>            if (conf == null)<a name="line.214"></a>
<FONT color="green">215</FONT>            {<a name="line.215"></a>
<FONT color="green">216</FONT>                return null;<a name="line.216"></a>
<FONT color="green">217</FONT>            }<a name="line.217"></a>
<FONT color="green">218</FONT>    <a name="line.218"></a>
<FONT color="green">219</FONT>            if (conf instanceof HierarchicalConfiguration)<a name="line.219"></a>
<FONT color="green">220</FONT>            {<a name="line.220"></a>
<FONT color="green">221</FONT>                HierarchicalConfiguration hc;<a name="line.221"></a>
<FONT color="green">222</FONT>                if (conf instanceof Reloadable)<a name="line.222"></a>
<FONT color="green">223</FONT>                {<a name="line.223"></a>
<FONT color="green">224</FONT>                    Object lock = ((Reloadable) conf).getReloadLock();<a name="line.224"></a>
<FONT color="green">225</FONT>                    synchronized (lock)<a name="line.225"></a>
<FONT color="green">226</FONT>                    {<a name="line.226"></a>
<FONT color="green">227</FONT>                        hc = new HierarchicalConfiguration((HierarchicalConfiguration) conf);<a name="line.227"></a>
<FONT color="green">228</FONT>                    }<a name="line.228"></a>
<FONT color="green">229</FONT>                }<a name="line.229"></a>
<FONT color="green">230</FONT>                else<a name="line.230"></a>
<FONT color="green">231</FONT>                {<a name="line.231"></a>
<FONT color="green">232</FONT>                    hc = (HierarchicalConfiguration) conf;<a name="line.232"></a>
<FONT color="green">233</FONT>                }<a name="line.233"></a>
<FONT color="green">234</FONT>                if (engine != null)<a name="line.234"></a>
<FONT color="green">235</FONT>                {<a name="line.235"></a>
<FONT color="green">236</FONT>                    hc.setExpressionEngine(engine);<a name="line.236"></a>
<FONT color="green">237</FONT>                }<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>                return hc;<a name="line.239"></a>
<FONT color="green">240</FONT>            }<a name="line.240"></a>
<FONT color="green">241</FONT>            else<a name="line.241"></a>
<FONT color="green">242</FONT>            {<a name="line.242"></a>
<FONT color="green">243</FONT>                HierarchicalConfiguration hc = new HierarchicalConfiguration();<a name="line.243"></a>
<FONT color="green">244</FONT>                if (engine != null)<a name="line.244"></a>
<FONT color="green">245</FONT>                {<a name="line.245"></a>
<FONT color="green">246</FONT>                    hc.setExpressionEngine(engine);<a name="line.246"></a>
<FONT color="green">247</FONT>                }<a name="line.247"></a>
<FONT color="green">248</FONT>    <a name="line.248"></a>
<FONT color="green">249</FONT>                // Workaround for problem with copy()<a name="line.249"></a>
<FONT color="green">250</FONT>                boolean delimiterParsingStatus = hc.isDelimiterParsingDisabled();<a name="line.250"></a>
<FONT color="green">251</FONT>                hc.setDelimiterParsingDisabled(true);<a name="line.251"></a>
<FONT color="green">252</FONT>                hc.append(conf);<a name="line.252"></a>
<FONT color="green">253</FONT>                hc.setDelimiterParsingDisabled(delimiterParsingStatus);<a name="line.253"></a>
<FONT color="green">254</FONT>                return hc;<a name="line.254"></a>
<FONT color="green">255</FONT>            }<a name="line.255"></a>
<FONT color="green">256</FONT>        }<a name="line.256"></a>
<FONT color="green">257</FONT>    <a name="line.257"></a>
<FONT color="green">258</FONT>        /**<a name="line.258"></a>
<FONT color="green">259</FONT>         * Clones the given configuration object if this is possible. If the passed<a name="line.259"></a>
<FONT color="green">260</FONT>         * in configuration object implements the {@code Cloneable}<a name="line.260"></a>
<FONT color="green">261</FONT>         * interface, its {@code clone()} method will be invoked. Otherwise<a name="line.261"></a>
<FONT color="green">262</FONT>         * an exception will be thrown.<a name="line.262"></a>
<FONT color="green">263</FONT>         *<a name="line.263"></a>
<FONT color="green">264</FONT>         * @param config the configuration object to be cloned (can be &lt;b&gt;null&lt;/b&gt;)<a name="line.264"></a>
<FONT color="green">265</FONT>         * @return the cloned configuration (&lt;b&gt;null&lt;/b&gt; if the argument was<a name="line.265"></a>
<FONT color="green">266</FONT>         * &lt;b&gt;null&lt;/b&gt;, too)<a name="line.266"></a>
<FONT color="green">267</FONT>         * @throws ConfigurationRuntimeException if cloning is not supported for<a name="line.267"></a>
<FONT color="green">268</FONT>         * this object<a name="line.268"></a>
<FONT color="green">269</FONT>         * @since 1.3<a name="line.269"></a>
<FONT color="green">270</FONT>         */<a name="line.270"></a>
<FONT color="green">271</FONT>        public static Configuration cloneConfiguration(Configuration config)<a name="line.271"></a>
<FONT color="green">272</FONT>                throws ConfigurationRuntimeException<a name="line.272"></a>
<FONT color="green">273</FONT>        {<a name="line.273"></a>
<FONT color="green">274</FONT>            if (config == null)<a name="line.274"></a>
<FONT color="green">275</FONT>            {<a name="line.275"></a>
<FONT color="green">276</FONT>                return null;<a name="line.276"></a>
<FONT color="green">277</FONT>            }<a name="line.277"></a>
<FONT color="green">278</FONT>            else<a name="line.278"></a>
<FONT color="green">279</FONT>            {<a name="line.279"></a>
<FONT color="green">280</FONT>                try<a name="line.280"></a>
<FONT color="green">281</FONT>                {<a name="line.281"></a>
<FONT color="green">282</FONT>                    return (Configuration) clone(config);<a name="line.282"></a>
<FONT color="green">283</FONT>                }<a name="line.283"></a>
<FONT color="green">284</FONT>                catch (CloneNotSupportedException cnex)<a name="line.284"></a>
<FONT color="green">285</FONT>                {<a name="line.285"></a>
<FONT color="green">286</FONT>                    throw new ConfigurationRuntimeException(cnex);<a name="line.286"></a>
<FONT color="green">287</FONT>                }<a name="line.287"></a>
<FONT color="green">288</FONT>            }<a name="line.288"></a>
<FONT color="green">289</FONT>        }<a name="line.289"></a>
<FONT color="green">290</FONT>    <a name="line.290"></a>
<FONT color="green">291</FONT>        /**<a name="line.291"></a>
<FONT color="green">292</FONT>         * An internally used helper method for cloning objects. This implementation<a name="line.292"></a>
<FONT color="green">293</FONT>         * is not very sophisticated nor efficient. Maybe it can be replaced by an<a name="line.293"></a>
<FONT color="green">294</FONT>         * implementation from Commons Lang later. The method checks whether the<a name="line.294"></a>
<FONT color="green">295</FONT>         * passed in object implements the {@code Cloneable} interface. If<a name="line.295"></a>
<FONT color="green">296</FONT>         * this is the case, the {@code clone()} method is invoked by<a name="line.296"></a>
<FONT color="green">297</FONT>         * reflection. Errors that occur during the cloning process are re-thrown as<a name="line.297"></a>
<FONT color="green">298</FONT>         * runtime exceptions.<a name="line.298"></a>
<FONT color="green">299</FONT>         *<a name="line.299"></a>
<FONT color="green">300</FONT>         * @param obj the object to be cloned<a name="line.300"></a>
<FONT color="green">301</FONT>         * @return the cloned object<a name="line.301"></a>
<FONT color="green">302</FONT>         * @throws CloneNotSupportedException if the object cannot be cloned<a name="line.302"></a>
<FONT color="green">303</FONT>         */<a name="line.303"></a>
<FONT color="green">304</FONT>        static Object clone(Object obj) throws CloneNotSupportedException<a name="line.304"></a>
<FONT color="green">305</FONT>        {<a name="line.305"></a>
<FONT color="green">306</FONT>            if (obj instanceof Cloneable)<a name="line.306"></a>
<FONT color="green">307</FONT>            {<a name="line.307"></a>
<FONT color="green">308</FONT>                try<a name="line.308"></a>
<FONT color="green">309</FONT>                {<a name="line.309"></a>
<FONT color="green">310</FONT>                    Method m = obj.getClass().getMethod(METHOD_CLONE);<a name="line.310"></a>
<FONT color="green">311</FONT>                    return m.invoke(obj);<a name="line.311"></a>
<FONT color="green">312</FONT>                }<a name="line.312"></a>
<FONT color="green">313</FONT>                catch (NoSuchMethodException nmex)<a name="line.313"></a>
<FONT color="green">314</FONT>                {<a name="line.314"></a>
<FONT color="green">315</FONT>                    throw new CloneNotSupportedException(<a name="line.315"></a>
<FONT color="green">316</FONT>                            "No clone() method found for class"<a name="line.316"></a>
<FONT color="green">317</FONT>                                    + obj.getClass().getName());<a name="line.317"></a>
<FONT color="green">318</FONT>                }<a name="line.318"></a>
<FONT color="green">319</FONT>                catch (IllegalAccessException iaex)<a name="line.319"></a>
<FONT color="green">320</FONT>                {<a name="line.320"></a>
<FONT color="green">321</FONT>                    throw new ConfigurationRuntimeException(iaex);<a name="line.321"></a>
<FONT color="green">322</FONT>                }<a name="line.322"></a>
<FONT color="green">323</FONT>                catch (InvocationTargetException itex)<a name="line.323"></a>
<FONT color="green">324</FONT>                {<a name="line.324"></a>
<FONT color="green">325</FONT>                    throw new ConfigurationRuntimeException(itex);<a name="line.325"></a>
<FONT color="green">326</FONT>                }<a name="line.326"></a>
<FONT color="green">327</FONT>            }<a name="line.327"></a>
<FONT color="green">328</FONT>            else<a name="line.328"></a>
<FONT color="green">329</FONT>            {<a name="line.329"></a>
<FONT color="green">330</FONT>                throw new CloneNotSupportedException(obj.getClass().getName()<a name="line.330"></a>
<FONT color="green">331</FONT>                        + " does not implement Cloneable");<a name="line.331"></a>
<FONT color="green">332</FONT>            }<a name="line.332"></a>
<FONT color="green">333</FONT>        }<a name="line.333"></a>
<FONT color="green">334</FONT>    <a name="line.334"></a>
<FONT color="green">335</FONT>        /**<a name="line.335"></a>
<FONT color="green">336</FONT>         * Constructs a URL from a base path and a file name. The file name can<a name="line.336"></a>
<FONT color="green">337</FONT>         * be absolute, relative or a full URL. If necessary the base path URL is<a name="line.337"></a>
<FONT color="green">338</FONT>         * applied.<a name="line.338"></a>
<FONT color="green">339</FONT>         *<a name="line.339"></a>
<FONT color="green">340</FONT>         * @param basePath the base path URL (can be &lt;b&gt;null&lt;/b&gt;)<a name="line.340"></a>
<FONT color="green">341</FONT>         * @param file the file name<a name="line.341"></a>
<FONT color="green">342</FONT>         * @return the resulting URL<a name="line.342"></a>
<FONT color="green">343</FONT>         * @throws MalformedURLException if URLs are invalid<a name="line.343"></a>
<FONT color="green">344</FONT>         */<a name="line.344"></a>
<FONT color="green">345</FONT>        public static URL getURL(String basePath, String file) throws MalformedURLException<a name="line.345"></a>
<FONT color="green">346</FONT>        {<a name="line.346"></a>
<FONT color="green">347</FONT>            return FileSystem.getDefaultFileSystem().getURL(basePath, file);<a name="line.347"></a>
<FONT color="green">348</FONT>        }<a name="line.348"></a>
<FONT color="green">349</FONT>    <a name="line.349"></a>
<FONT color="green">350</FONT>        /**<a name="line.350"></a>
<FONT color="green">351</FONT>         * Helper method for constructing a file object from a base path and a<a name="line.351"></a>
<FONT color="green">352</FONT>         * file name. This method is called if the base path passed to<a name="line.352"></a>
<FONT color="green">353</FONT>         * {@code getURL()} does not seem to be a valid URL.<a name="line.353"></a>
<FONT color="green">354</FONT>         *<a name="line.354"></a>
<FONT color="green">355</FONT>         * @param basePath the base path<a name="line.355"></a>
<FONT color="green">356</FONT>         * @param fileName the file name<a name="line.356"></a>
<FONT color="green">357</FONT>         * @return the resulting file<a name="line.357"></a>
<FONT color="green">358</FONT>         */<a name="line.358"></a>
<FONT color="green">359</FONT>        static File constructFile(String basePath, String fileName)<a name="line.359"></a>
<FONT color="green">360</FONT>        {<a name="line.360"></a>
<FONT color="green">361</FONT>            File file;<a name="line.361"></a>
<FONT color="green">362</FONT>    <a name="line.362"></a>
<FONT color="green">363</FONT>            File absolute = null;<a name="line.363"></a>
<FONT color="green">364</FONT>            if (fileName != null)<a name="line.364"></a>
<FONT color="green">365</FONT>            {<a name="line.365"></a>
<FONT color="green">366</FONT>                absolute = new File(fileName);<a name="line.366"></a>
<FONT color="green">367</FONT>            }<a name="line.367"></a>
<FONT color="green">368</FONT>    <a name="line.368"></a>
<FONT color="green">369</FONT>            if (StringUtils.isEmpty(basePath) || (absolute != null &amp;&amp; absolute.isAbsolute()))<a name="line.369"></a>
<FONT color="green">370</FONT>            {<a name="line.370"></a>
<FONT color="green">371</FONT>                file = new File(fileName);<a name="line.371"></a>
<FONT color="green">372</FONT>            }<a name="line.372"></a>
<FONT color="green">373</FONT>            else<a name="line.373"></a>
<FONT color="green">374</FONT>            {<a name="line.374"></a>
<FONT color="green">375</FONT>                StringBuilder fName = new StringBuilder();<a name="line.375"></a>
<FONT color="green">376</FONT>                fName.append(basePath);<a name="line.376"></a>
<FONT color="green">377</FONT>    <a name="line.377"></a>
<FONT color="green">378</FONT>                // My best friend. Paranoia.<a name="line.378"></a>
<FONT color="green">379</FONT>                if (!basePath.endsWith(File.separator))<a name="line.379"></a>
<FONT color="green">380</FONT>                {<a name="line.380"></a>
<FONT color="green">381</FONT>                    fName.append(File.separator);<a name="line.381"></a>
<FONT color="green">382</FONT>                }<a name="line.382"></a>
<FONT color="green">383</FONT>    <a name="line.383"></a>
<FONT color="green">384</FONT>                //<a name="line.384"></a>
<FONT color="green">385</FONT>                // We have a relative path, and we have<a name="line.385"></a>
<FONT color="green">386</FONT>                // two possible forms here. If we have the<a name="line.386"></a>
<FONT color="green">387</FONT>                // "./" form then just strip that off first<a name="line.387"></a>
<FONT color="green">388</FONT>                // before continuing.<a name="line.388"></a>
<FONT color="green">389</FONT>                //<a name="line.389"></a>
<FONT color="green">390</FONT>                if (fileName.startsWith("." + File.separator))<a name="line.390"></a>
<FONT color="green">391</FONT>                {<a name="line.391"></a>
<FONT color="green">392</FONT>                    fName.append(fileName.substring(2));<a name="line.392"></a>
<FONT color="green">393</FONT>                }<a name="line.393"></a>
<FONT color="green">394</FONT>                else<a name="line.394"></a>
<FONT color="green">395</FONT>                {<a name="line.395"></a>
<FONT color="green">396</FONT>                    fName.append(fileName);<a name="line.396"></a>
<FONT color="green">397</FONT>                }<a name="line.397"></a>
<FONT color="green">398</FONT>    <a name="line.398"></a>
<FONT color="green">399</FONT>                file = new File(fName.toString());<a name="line.399"></a>
<FONT color="green">400</FONT>            }<a name="line.400"></a>
<FONT color="green">401</FONT>    <a name="line.401"></a>
<FONT color="green">402</FONT>            return file;<a name="line.402"></a>
<FONT color="green">403</FONT>        }<a name="line.403"></a>
<FONT color="green">404</FONT>    <a name="line.404"></a>
<FONT color="green">405</FONT>        /**<a name="line.405"></a>
<FONT color="green">406</FONT>         * Return the location of the specified resource by searching the user home<a name="line.406"></a>
<FONT color="green">407</FONT>         * directory, the current classpath and the system classpath.<a name="line.407"></a>
<FONT color="green">408</FONT>         *<a name="line.408"></a>
<FONT color="green">409</FONT>         * @param name the name of the resource<a name="line.409"></a>
<FONT color="green">410</FONT>         *<a name="line.410"></a>
<FONT color="green">411</FONT>         * @return the location of the resource<a name="line.411"></a>
<FONT color="green">412</FONT>         */<a name="line.412"></a>
<FONT color="green">413</FONT>        public static URL locate(String name)<a name="line.413"></a>
<FONT color="green">414</FONT>        {<a name="line.414"></a>
<FONT color="green">415</FONT>            return locate(null, name);<a name="line.415"></a>
<FONT color="green">416</FONT>        }<a name="line.416"></a>
<FONT color="green">417</FONT>    <a name="line.417"></a>
<FONT color="green">418</FONT>        /**<a name="line.418"></a>
<FONT color="green">419</FONT>         * Return the location of the specified resource by searching the user home<a name="line.419"></a>
<FONT color="green">420</FONT>         * directory, the current classpath and the system classpath.<a name="line.420"></a>
<FONT color="green">421</FONT>         *<a name="line.421"></a>
<FONT color="green">422</FONT>         * @param base the base path of the resource<a name="line.422"></a>
<FONT color="green">423</FONT>         * @param name the name of the resource<a name="line.423"></a>
<FONT color="green">424</FONT>         *<a name="line.424"></a>
<FONT color="green">425</FONT>         * @return the location of the resource<a name="line.425"></a>
<FONT color="green">426</FONT>         */<a name="line.426"></a>
<FONT color="green">427</FONT>        public static URL locate(String base, String name)<a name="line.427"></a>
<FONT color="green">428</FONT>        {<a name="line.428"></a>
<FONT color="green">429</FONT>            return locate(FileSystem.getDefaultFileSystem(), base, name);<a name="line.429"></a>
<FONT color="green">430</FONT>        }<a name="line.430"></a>
<FONT color="green">431</FONT>    <a name="line.431"></a>
<FONT color="green">432</FONT>        /**<a name="line.432"></a>
<FONT color="green">433</FONT>         * Return the location of the specified resource by searching the user home<a name="line.433"></a>
<FONT color="green">434</FONT>         * directory, the current classpath and the system classpath.<a name="line.434"></a>
<FONT color="green">435</FONT>         *<a name="line.435"></a>
<FONT color="green">436</FONT>         * @param fileSystem the FileSystem to use.<a name="line.436"></a>
<FONT color="green">437</FONT>         * @param base the base path of the resource<a name="line.437"></a>
<FONT color="green">438</FONT>         * @param name the name of the resource<a name="line.438"></a>
<FONT color="green">439</FONT>         *<a name="line.439"></a>
<FONT color="green">440</FONT>         * @return the location of the resource<a name="line.440"></a>
<FONT color="green">441</FONT>         */<a name="line.441"></a>
<FONT color="green">442</FONT>        public static URL locate(FileSystem fileSystem, String base, String name)<a name="line.442"></a>
<FONT color="green">443</FONT>        {<a name="line.443"></a>
<FONT color="green">444</FONT>            if (LOG.isDebugEnabled())<a name="line.444"></a>
<FONT color="green">445</FONT>            {<a name="line.445"></a>
<FONT color="green">446</FONT>                StringBuilder buf = new StringBuilder();<a name="line.446"></a>
<FONT color="green">447</FONT>                buf.append("ConfigurationUtils.locate(): base is ").append(base);<a name="line.447"></a>
<FONT color="green">448</FONT>                buf.append(", name is ").append(name);<a name="line.448"></a>
<FONT color="green">449</FONT>                LOG.debug(buf.toString());<a name="line.449"></a>
<FONT color="green">450</FONT>            }<a name="line.450"></a>
<FONT color="green">451</FONT>    <a name="line.451"></a>
<FONT color="green">452</FONT>            if (name == null)<a name="line.452"></a>
<FONT color="green">453</FONT>            {<a name="line.453"></a>
<FONT color="green">454</FONT>                // undefined, always return null<a name="line.454"></a>
<FONT color="green">455</FONT>                return null;<a name="line.455"></a>
<FONT color="green">456</FONT>            }<a name="line.456"></a>
<FONT color="green">457</FONT>    <a name="line.457"></a>
<FONT color="green">458</FONT>            // attempt to create an URL directly<a name="line.458"></a>
<FONT color="green">459</FONT>    <a name="line.459"></a>
<FONT color="green">460</FONT>            URL url = fileSystem.locateFromURL(base, name);<a name="line.460"></a>
<FONT color="green">461</FONT>    <a name="line.461"></a>
<FONT color="green">462</FONT>            // attempt to load from an absolute path<a name="line.462"></a>
<FONT color="green">463</FONT>            if (url == null)<a name="line.463"></a>
<FONT color="green">464</FONT>            {<a name="line.464"></a>
<FONT color="green">465</FONT>                File file = new File(name);<a name="line.465"></a>
<FONT color="green">466</FONT>                if (file.isAbsolute() &amp;&amp; file.exists()) // already absolute?<a name="line.466"></a>
<FONT color="green">467</FONT>                {<a name="line.467"></a>
<FONT color="green">468</FONT>                    try<a name="line.468"></a>
<FONT color="green">469</FONT>                    {<a name="line.469"></a>
<FONT color="green">470</FONT>                        url = toURL(file);<a name="line.470"></a>
<FONT color="green">471</FONT>                        LOG.debug("Loading configuration from the absolute path " + name);<a name="line.471"></a>
<FONT color="green">472</FONT>                    }<a name="line.472"></a>
<FONT color="green">473</FONT>                    catch (MalformedURLException e)<a name="line.473"></a>
<FONT color="green">474</FONT>                    {<a name="line.474"></a>
<FONT color="green">475</FONT>                        LOG.warn("Could not obtain URL from file", e);<a name="line.475"></a>
<FONT color="green">476</FONT>                    }<a name="line.476"></a>
<FONT color="green">477</FONT>                }<a name="line.477"></a>
<FONT color="green">478</FONT>            }<a name="line.478"></a>
<FONT color="green">479</FONT>    <a name="line.479"></a>
<FONT color="green">480</FONT>            // attempt to load from the base directory<a name="line.480"></a>
<FONT color="green">481</FONT>            if (url == null)<a name="line.481"></a>
<FONT color="green">482</FONT>            {<a name="line.482"></a>
<FONT color="green">483</FONT>                try<a name="line.483"></a>
<FONT color="green">484</FONT>                {<a name="line.484"></a>
<FONT color="green">485</FONT>                    File file = constructFile(base, name);<a name="line.485"></a>
<FONT color="green">486</FONT>                    if (file != null &amp;&amp; file.exists())<a name="line.486"></a>
<FONT color="green">487</FONT>                    {<a name="line.487"></a>
<FONT color="green">488</FONT>                        url = toURL(file);<a name="line.488"></a>
<FONT color="green">489</FONT>                    }<a name="line.489"></a>
<FONT color="green">490</FONT>    <a name="line.490"></a>
<FONT color="green">491</FONT>                    if (url != null)<a name="line.491"></a>
<FONT color="green">492</FONT>                    {<a name="line.492"></a>
<FONT color="green">493</FONT>                        LOG.debug("Loading configuration from the path " + file);<a name="line.493"></a>
<FONT color="green">494</FONT>                    }<a name="line.494"></a>
<FONT color="green">495</FONT>                }<a name="line.495"></a>
<FONT color="green">496</FONT>                catch (MalformedURLException e)<a name="line.496"></a>
<FONT color="green">497</FONT>                {<a name="line.497"></a>
<FONT color="green">498</FONT>                    LOG.warn("Could not obtain URL from file", e);<a name="line.498"></a>
<FONT color="green">499</FONT>                }<a name="line.499"></a>
<FONT color="green">500</FONT>            }<a name="line.500"></a>
<FONT color="green">501</FONT>    <a name="line.501"></a>
<FONT color="green">502</FONT>            // attempt to load from the user home directory<a name="line.502"></a>
<FONT color="green">503</FONT>            if (url == null)<a name="line.503"></a>
<FONT color="green">504</FONT>            {<a name="line.504"></a>
<FONT color="green">505</FONT>                try<a name="line.505"></a>
<FONT color="green">506</FONT>                {<a name="line.506"></a>
<FONT color="green">507</FONT>                    File file = constructFile(System.getProperty("user.home"), name);<a name="line.507"></a>
<FONT color="green">508</FONT>                    if (file != null &amp;&amp; file.exists())<a name="line.508"></a>
<FONT color="green">509</FONT>                    {<a name="line.509"></a>
<FONT color="green">510</FONT>                        url = toURL(file);<a name="line.510"></a>
<FONT color="green">511</FONT>                    }<a name="line.511"></a>
<FONT color="green">512</FONT>    <a name="line.512"></a>
<FONT color="green">513</FONT>                    if (url != null)<a name="line.513"></a>
<FONT color="green">514</FONT>                    {<a name="line.514"></a>
<FONT color="green">515</FONT>                        LOG.debug("Loading configuration from the home path " + file);<a name="line.515"></a>
<FONT color="green">516</FONT>                    }<a name="line.516"></a>
<FONT color="green">517</FONT>    <a name="line.517"></a>
<FONT color="green">518</FONT>                }<a name="line.518"></a>
<FONT color="green">519</FONT>                catch (MalformedURLException e)<a name="line.519"></a>
<FONT color="green">520</FONT>                {<a name="line.520"></a>
<FONT color="green">521</FONT>                    LOG.warn("Could not obtain URL from file", e);<a name="line.521"></a>
<FONT color="green">522</FONT>                }<a name="line.522"></a>
<FONT color="green">523</FONT>            }<a name="line.523"></a>
<FONT color="green">524</FONT>    <a name="line.524"></a>
<FONT color="green">525</FONT>            // attempt to load from classpath<a name="line.525"></a>
<FONT color="green">526</FONT>            if (url == null)<a name="line.526"></a>
<FONT color="green">527</FONT>            {<a name="line.527"></a>
<FONT color="green">528</FONT>                url = locateFromClasspath(name);<a name="line.528"></a>
<FONT color="green">529</FONT>            }<a name="line.529"></a>
<FONT color="green">530</FONT>            return url;<a name="line.530"></a>
<FONT color="green">531</FONT>        }<a name="line.531"></a>
<FONT color="green">532</FONT>    <a name="line.532"></a>
<FONT color="green">533</FONT>        /**<a name="line.533"></a>
<FONT color="green">534</FONT>         * Tries to find a resource with the given name in the classpath.<a name="line.534"></a>
<FONT color="green">535</FONT>         * @param resourceName the name of the resource<a name="line.535"></a>
<FONT color="green">536</FONT>         * @return the URL to the found resource or &lt;b&gt;null&lt;/b&gt; if the resource<a name="line.536"></a>
<FONT color="green">537</FONT>         * cannot be found<a name="line.537"></a>
<FONT color="green">538</FONT>         */<a name="line.538"></a>
<FONT color="green">539</FONT>        static URL locateFromClasspath(String resourceName)<a name="line.539"></a>
<FONT color="green">540</FONT>        {<a name="line.540"></a>
<FONT color="green">541</FONT>            URL url = null;<a name="line.541"></a>
<FONT color="green">542</FONT>            // attempt to load from the context classpath<a name="line.542"></a>
<FONT color="green">543</FONT>            ClassLoader loader = Thread.currentThread().getContextClassLoader();<a name="line.543"></a>
<FONT color="green">544</FONT>            if (loader != null)<a name="line.544"></a>
<FONT color="green">545</FONT>            {<a name="line.545"></a>
<FONT color="green">546</FONT>                url = loader.getResource(resourceName);<a name="line.546"></a>
<FONT color="green">547</FONT>    <a name="line.547"></a>
<FONT color="green">548</FONT>                if (url != null)<a name="line.548"></a>
<FONT color="green">549</FONT>                {<a name="line.549"></a>
<FONT color="green">550</FONT>                    LOG.debug("Loading configuration from the context classpath (" + resourceName + ")");<a name="line.550"></a>
<FONT color="green">551</FONT>                }<a name="line.551"></a>
<FONT color="green">552</FONT>            }<a name="line.552"></a>
<FONT color="green">553</FONT>    <a name="line.553"></a>
<FONT color="green">554</FONT>            // attempt to load from the system classpath<a name="line.554"></a>
<FONT color="green">555</FONT>            if (url == null)<a name="line.555"></a>
<FONT color="green">556</FONT>            {<a name="line.556"></a>
<FONT color="green">557</FONT>                url = ClassLoader.getSystemResource(resourceName);<a name="line.557"></a>
<FONT color="green">558</FONT>    <a name="line.558"></a>
<FONT color="green">559</FONT>                if (url != null)<a name="line.559"></a>
<FONT color="green">560</FONT>                {<a name="line.560"></a>
<FONT color="green">561</FONT>                    LOG.debug("Loading configuration from the system classpath (" + resourceName + ")");<a name="line.561"></a>
<FONT color="green">562</FONT>                }<a name="line.562"></a>
<FONT color="green">563</FONT>            }<a name="line.563"></a>
<FONT color="green">564</FONT>            return url;<a name="line.564"></a>
<FONT color="green">565</FONT>        }<a name="line.565"></a>
<FONT color="green">566</FONT>    <a name="line.566"></a>
<FONT color="green">567</FONT>        /**<a name="line.567"></a>
<FONT color="green">568</FONT>         * Return the path without the file name, for example http://xyz.net/foo/bar.xml<a name="line.568"></a>
<FONT color="green">569</FONT>         * results in http://xyz.net/foo/<a name="line.569"></a>
<FONT color="green">570</FONT>         *<a name="line.570"></a>
<FONT color="green">571</FONT>         * @param url the URL from which to extract the path<a name="line.571"></a>
<FONT color="green">572</FONT>         * @return the path component of the passed in URL<a name="line.572"></a>
<FONT color="green">573</FONT>         */<a name="line.573"></a>
<FONT color="green">574</FONT>        static String getBasePath(URL url)<a name="line.574"></a>
<FONT color="green">575</FONT>        {<a name="line.575"></a>
<FONT color="green">576</FONT>            if (url == null)<a name="line.576"></a>
<FONT color="green">577</FONT>            {<a name="line.577"></a>
<FONT color="green">578</FONT>                return null;<a name="line.578"></a>
<FONT color="green">579</FONT>            }<a name="line.579"></a>
<FONT color="green">580</FONT>    <a name="line.580"></a>
<FONT color="green">581</FONT>            String s = url.toString();<a name="line.581"></a>
<FONT color="green">582</FONT>            if (s.startsWith(FILE_SCHEME) &amp;&amp; !s.startsWith("file://"))<a name="line.582"></a>
<FONT color="green">583</FONT>            {<a name="line.583"></a>
<FONT color="green">584</FONT>                s = "file://" + s.substring(FILE_SCHEME.length());<a name="line.584"></a>
<FONT color="green">585</FONT>            }<a name="line.585"></a>
<FONT color="green">586</FONT>    <a name="line.586"></a>
<FONT color="green">587</FONT>            if (s.endsWith("/") || StringUtils.isEmpty(url.getPath()))<a name="line.587"></a>
<FONT color="green">588</FONT>            {<a name="line.588"></a>
<FONT color="green">589</FONT>                return s;<a name="line.589"></a>
<FONT color="green">590</FONT>            }<a name="line.590"></a>
<FONT color="green">591</FONT>            else<a name="line.591"></a>
<FONT color="green">592</FONT>            {<a name="line.592"></a>
<FONT color="green">593</FONT>                return s.substring(0, s.lastIndexOf("/") + 1);<a name="line.593"></a>
<FONT color="green">594</FONT>            }<a name="line.594"></a>
<FONT color="green">595</FONT>        }<a name="line.595"></a>
<FONT color="green">596</FONT>    <a name="line.596"></a>
<FONT color="green">597</FONT>        /**<a name="line.597"></a>
<FONT color="green">598</FONT>         * Extract the file name from the specified URL.<a name="line.598"></a>
<FONT color="green">599</FONT>         *<a name="line.599"></a>
<FONT color="green">600</FONT>         * @param url the URL from which to extract the file name<a name="line.600"></a>
<FONT color="green">601</FONT>         * @return the extracted file name<a name="line.601"></a>
<FONT color="green">602</FONT>         */<a name="line.602"></a>
<FONT color="green">603</FONT>        static String getFileName(URL url)<a name="line.603"></a>
<FONT color="green">604</FONT>        {<a name="line.604"></a>
<FONT color="green">605</FONT>            if (url == null)<a name="line.605"></a>
<FONT color="green">606</FONT>            {<a name="line.606"></a>
<FONT color="green">607</FONT>                return null;<a name="line.607"></a>
<FONT color="green">608</FONT>            }<a name="line.608"></a>
<FONT color="green">609</FONT>    <a name="line.609"></a>
<FONT color="green">610</FONT>            String path = url.getPath();<a name="line.610"></a>
<FONT color="green">611</FONT>    <a name="line.611"></a>
<FONT color="green">612</FONT>            if (path.endsWith("/") || StringUtils.isEmpty(path))<a name="line.612"></a>
<FONT color="green">613</FONT>            {<a name="line.613"></a>
<FONT color="green">614</FONT>                return null;<a name="line.614"></a>
<FONT color="green">615</FONT>            }<a name="line.615"></a>
<FONT color="green">616</FONT>            else<a name="line.616"></a>
<FONT color="green">617</FONT>            {<a name="line.617"></a>
<FONT color="green">618</FONT>                return path.substring(path.lastIndexOf("/") + 1);<a name="line.618"></a>
<FONT color="green">619</FONT>            }<a name="line.619"></a>
<FONT color="green">620</FONT>        }<a name="line.620"></a>
<FONT color="green">621</FONT>    <a name="line.621"></a>
<FONT color="green">622</FONT>        /**<a name="line.622"></a>
<FONT color="green">623</FONT>         * Tries to convert the specified base path and file name into a file object.<a name="line.623"></a>
<FONT color="green">624</FONT>         * This method is called e.g. by the save() methods of file based<a name="line.624"></a>
<FONT color="green">625</FONT>         * configurations. The parameter strings can be relative files, absolute<a name="line.625"></a>
<FONT color="green">626</FONT>         * files and URLs as well. This implementation checks first whether the passed in<a name="line.626"></a>
<FONT color="green">627</FONT>         * file name is absolute. If this is the case, it is returned. Otherwise<a name="line.627"></a>
<FONT color="green">628</FONT>         * further checks are performed whether the base path and file name can be<a name="line.628"></a>
<FONT color="green">629</FONT>         * combined to a valid URL or a valid file name. &lt;em&gt;Note:&lt;/em&gt; The test<a name="line.629"></a>
<FONT color="green">630</FONT>         * if the passed in file name is absolute is performed using<a name="line.630"></a>
<FONT color="green">631</FONT>         * {@code java.io.File.isAbsolute()}. If the file name starts with a<a name="line.631"></a>
<FONT color="green">632</FONT>         * slash, this method will return &lt;b&gt;true&lt;/b&gt; on Unix, but &lt;b&gt;false&lt;/b&gt; on<a name="line.632"></a>
<FONT color="green">633</FONT>         * Windows. So to ensure correct behavior for relative file names on all<a name="line.633"></a>
<FONT color="green">634</FONT>         * platforms you should never let relative paths start with a slash. E.g.<a name="line.634"></a>
<FONT color="green">635</FONT>         * in a configuration definition file do not use something like that:<a name="line.635"></a>
<FONT color="green">636</FONT>         * &lt;pre&gt;<a name="line.636"></a>
<FONT color="green">637</FONT>         * &amp;lt;properties fileName="/subdir/my.properties"/&amp;gt;<a name="line.637"></a>
<FONT color="green">638</FONT>         * &lt;/pre&gt;<a name="line.638"></a>
<FONT color="green">639</FONT>         * Under Windows this path would be resolved relative to the configuration<a name="line.639"></a>
<FONT color="green">640</FONT>         * definition file. Under Unix this would be treated as an absolute path<a name="line.640"></a>
<FONT color="green">641</FONT>         * name.<a name="line.641"></a>
<FONT color="green">642</FONT>         *<a name="line.642"></a>
<FONT color="green">643</FONT>         * @param basePath the base path<a name="line.643"></a>
<FONT color="green">644</FONT>         * @param fileName the file name<a name="line.644"></a>
<FONT color="green">645</FONT>         * @return the file object (&lt;b&gt;null&lt;/b&gt; if no file can be obtained)<a name="line.645"></a>
<FONT color="green">646</FONT>         */<a name="line.646"></a>
<FONT color="green">647</FONT>        public static File getFile(String basePath, String fileName)<a name="line.647"></a>
<FONT color="green">648</FONT>        {<a name="line.648"></a>
<FONT color="green">649</FONT>            // Check if the file name is absolute<a name="line.649"></a>
<FONT color="green">650</FONT>            File f = new File(fileName);<a name="line.650"></a>
<FONT color="green">651</FONT>            if (f.isAbsolute())<a name="line.651"></a>
<FONT color="green">652</FONT>            {<a name="line.652"></a>
<FONT color="green">653</FONT>                return f;<a name="line.653"></a>
<FONT color="green">654</FONT>            }<a name="line.654"></a>
<FONT color="green">655</FONT>    <a name="line.655"></a>
<FONT color="green">656</FONT>            // Check if URLs are involved<a name="line.656"></a>
<FONT color="green">657</FONT>            URL url;<a name="line.657"></a>
<FONT color="green">658</FONT>            try<a name="line.658"></a>
<FONT color="green">659</FONT>            {<a name="line.659"></a>
<FONT color="green">660</FONT>                url = new URL(new URL(basePath), fileName);<a name="line.660"></a>
<FONT color="green">661</FONT>            }<a name="line.661"></a>
<FONT color="green">662</FONT>            catch (MalformedURLException mex1)<a name="line.662"></a>
<FONT color="green">663</FONT>            {<a name="line.663"></a>
<FONT color="green">664</FONT>                try<a name="line.664"></a>
<FONT color="green">665</FONT>                {<a name="line.665"></a>
<FONT color="green">666</FONT>                    url = new URL(fileName);<a name="line.666"></a>
<FONT color="green">667</FONT>                }<a name="line.667"></a>
<FONT color="green">668</FONT>                catch (MalformedURLException mex2)<a name="line.668"></a>
<FONT color="green">669</FONT>                {<a name="line.669"></a>
<FONT color="green">670</FONT>                    url = null;<a name="line.670"></a>
<FONT color="green">671</FONT>                }<a name="line.671"></a>
<FONT color="green">672</FONT>            }<a name="line.672"></a>
<FONT color="green">673</FONT>    <a name="line.673"></a>
<FONT color="green">674</FONT>            if (url != null)<a name="line.674"></a>
<FONT color="green">675</FONT>            {<a name="line.675"></a>
<FONT color="green">676</FONT>                return fileFromURL(url);<a name="line.676"></a>
<FONT color="green">677</FONT>            }<a name="line.677"></a>
<FONT color="green">678</FONT>    <a name="line.678"></a>
<FONT color="green">679</FONT>            return constructFile(basePath, fileName);<a name="line.679"></a>
<FONT color="green">680</FONT>        }<a name="line.680"></a>
<FONT color="green">681</FONT>    <a name="line.681"></a>
<FONT color="green">682</FONT>        /**<a name="line.682"></a>
<FONT color="green">683</FONT>         * Tries to convert the specified URL to a file object. If this fails,<a name="line.683"></a>
<FONT color="green">684</FONT>         * &lt;b&gt;null&lt;/b&gt; is returned. Note: This code has been copied from the<a name="line.684"></a>
<FONT color="green">685</FONT>         * {@code FileUtils} class from &lt;em&gt;Commons IO&lt;/em&gt;.<a name="line.685"></a>
<FONT color="green">686</FONT>         *<a name="line.686"></a>
<FONT color="green">687</FONT>         * @param url the URL<a name="line.687"></a>
<FONT color="green">688</FONT>         * @return the resulting file object<a name="line.688"></a>
<FONT color="green">689</FONT>         */<a name="line.689"></a>
<FONT color="green">690</FONT>        public static File fileFromURL(URL url)<a name="line.690"></a>
<FONT color="green">691</FONT>        {<a name="line.691"></a>
<FONT color="green">692</FONT>            if (url == null || !url.getProtocol().equals(PROTOCOL_FILE))<a name="line.692"></a>
<FONT color="green">693</FONT>            {<a name="line.693"></a>
<FONT color="green">694</FONT>                return null;<a name="line.694"></a>
<FONT color="green">695</FONT>            }<a name="line.695"></a>
<FONT color="green">696</FONT>            else<a name="line.696"></a>
<FONT color="green">697</FONT>            {<a name="line.697"></a>
<FONT color="green">698</FONT>                String filename = url.getFile().replace('/', File.separatorChar);<a name="line.698"></a>
<FONT color="green">699</FONT>                int pos = 0;<a name="line.699"></a>
<FONT color="green">700</FONT>                while ((pos = filename.indexOf('%', pos)) &gt;= 0)<a name="line.700"></a>
<FONT color="green">701</FONT>                {<a name="line.701"></a>
<FONT color="green">702</FONT>                    if (pos + 2 &lt; filename.length())<a name="line.702"></a>
<FONT color="green">703</FONT>                    {<a name="line.703"></a>
<FONT color="green">704</FONT>                        String hexStr = filename.substring(pos + 1, pos + 3);<a name="line.704"></a>
<FONT color="green">705</FONT>                        char ch = (char) Integer.parseInt(hexStr, HEX);<a name="line.705"></a>
<FONT color="green">706</FONT>                        filename = filename.substring(0, pos) + ch<a name="line.706"></a>
<FONT color="green">707</FONT>                                + filename.substring(pos + 3);<a name="line.707"></a>
<FONT color="green">708</FONT>                    }<a name="line.708"></a>
<FONT color="green">709</FONT>                }<a name="line.709"></a>
<FONT color="green">710</FONT>                return new File(filename);<a name="line.710"></a>
<FONT color="green">711</FONT>            }<a name="line.711"></a>
<FONT color="green">712</FONT>        }<a name="line.712"></a>
<FONT color="green">713</FONT>    <a name="line.713"></a>
<FONT color="green">714</FONT>        /**<a name="line.714"></a>
<FONT color="green">715</FONT>         * Convert the specified file into an URL. This method is equivalent<a name="line.715"></a>
<FONT color="green">716</FONT>         * to file.toURI().toURL(). It was used to work around a bug in the JDK<a name="line.716"></a>
<FONT color="green">717</FONT>         * preventing the transformation of a file into an URL if the file name<a name="line.717"></a>
<FONT color="green">718</FONT>         * contains a '#' character. See the issue CONFIGURATION-300 for<a name="line.718"></a>
<FONT color="green">719</FONT>         * more details. Now that we switched to JDK 1.4 we can directly use<a name="line.719"></a>
<FONT color="green">720</FONT>         * file.toURI().toURL().<a name="line.720"></a>
<FONT color="green">721</FONT>         *<a name="line.721"></a>
<FONT color="green">722</FONT>         * @param file the file to be converted into an URL<a name="line.722"></a>
<FONT color="green">723</FONT>         */<a name="line.723"></a>
<FONT color="green">724</FONT>        static URL toURL(File file) throws MalformedURLException<a name="line.724"></a>
<FONT color="green">725</FONT>        {<a name="line.725"></a>
<FONT color="green">726</FONT>            return file.toURI().toURL();<a name="line.726"></a>
<FONT color="green">727</FONT>        }<a name="line.727"></a>
<FONT color="green">728</FONT>    <a name="line.728"></a>
<FONT color="green">729</FONT>        /**<a name="line.729"></a>
<FONT color="green">730</FONT>         * Enables runtime exceptions for the specified configuration object. This<a name="line.730"></a>
<FONT color="green">731</FONT>         * method can be used for configuration implementations that may face errors<a name="line.731"></a>
<FONT color="green">732</FONT>         * on normal property access, e.g. {@code DatabaseConfiguration} or<a name="line.732"></a>
<FONT color="green">733</FONT>         * {@code JNDIConfiguration}. Per default such errors are simply<a name="line.733"></a>
<FONT color="green">734</FONT>         * logged and then ignored. This implementation will register a special<a name="line.734"></a>
<FONT color="green">735</FONT>         * {@link ConfigurationErrorListener} that throws a runtime<a name="line.735"></a>
<FONT color="green">736</FONT>         * exception (namely a {@code ConfigurationRuntimeException}) on<a name="line.736"></a>
<FONT color="green">737</FONT>         * each received error event.<a name="line.737"></a>
<FONT color="green">738</FONT>         *<a name="line.738"></a>
<FONT color="green">739</FONT>         * @param src the configuration, for which runtime exceptions are to be<a name="line.739"></a>
<FONT color="green">740</FONT>         * enabled; this configuration must be derived from<a name="line.740"></a>
<FONT color="green">741</FONT>         * {@link EventSource}<a name="line.741"></a>
<FONT color="green">742</FONT>         */<a name="line.742"></a>
<FONT color="green">743</FONT>        public static void enableRuntimeExceptions(Configuration src)<a name="line.743"></a>
<FONT color="green">744</FONT>        {<a name="line.744"></a>
<FONT color="green">745</FONT>            if (!(src instanceof EventSource))<a name="line.745"></a>
<FONT color="green">746</FONT>            {<a name="line.746"></a>
<FONT color="green">747</FONT>                throw new IllegalArgumentException(<a name="line.747"></a>
<FONT color="green">748</FONT>                        "Configuration must be derived from EventSource!");<a name="line.748"></a>
<FONT color="green">749</FONT>            }<a name="line.749"></a>
<FONT color="green">750</FONT>            ((EventSource) src).addErrorListener(new ConfigurationErrorListener()<a name="line.750"></a>
<FONT color="green">751</FONT>            {<a name="line.751"></a>
<FONT color="green">752</FONT>                public void configurationError(ConfigurationErrorEvent event)<a name="line.752"></a>
<FONT color="green">753</FONT>                {<a name="line.753"></a>
<FONT color="green">754</FONT>                    // Throw a runtime exception<a name="line.754"></a>
<FONT color="green">755</FONT>                    throw new ConfigurationRuntimeException(event.getCause());<a name="line.755"></a>
<FONT color="green">756</FONT>                }<a name="line.756"></a>
<FONT color="green">757</FONT>            });<a name="line.757"></a>
<FONT color="green">758</FONT>        }<a name="line.758"></a>
<FONT color="green">759</FONT>    }<a name="line.759"></a>




























































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